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/*
* digi00x.c - a part of driver for Digidesign Digi 002/003 family
*
* Copyright (c) 2014-2015 Takashi Sakamoto
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "digi00x.h"
MODULE_DESCRIPTION("Digidesign Digi 002/003 family Driver");
MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
MODULE_LICENSE("GPL v2");
#define VENDOR_DIGIDESIGN 0x00a07e
#define MODEL_DIGI00X 0x000002
static int name_card(struct snd_dg00x *dg00x)
{
struct fw_device *fw_dev = fw_parent_device(dg00x->unit);
char name[32] = {0};
char *model;
int err;
err = fw_csr_string(dg00x->unit->directory, CSR_MODEL, name,
sizeof(name));
if (err < 0)
return err;
model = skip_spaces(name);
strcpy(dg00x->card->driver, "Digi00x");
strcpy(dg00x->card->shortname, model);
strcpy(dg00x->card->mixername, model);
snprintf(dg00x->card->longname, sizeof(dg00x->card->longname),
"Digidesign %s, GUID %08x%08x at %s, S%d", model,
fw_dev->config_rom[3], fw_dev->config_rom[4],
dev_name(&dg00x->unit->device), 100 << fw_dev->max_speed);
return 0;
}
static void dg00x_free(struct snd_dg00x *dg00x)
{
snd_dg00x_stream_destroy_duplex(dg00x);
snd_dg00x_transaction_unregister(dg00x);
fw_unit_put(dg00x->unit);
mutex_destroy(&dg00x->mutex);
}
static void dg00x_card_free(struct snd_card *card)
{
dg00x_free(card->private_data);
}
static void do_registration(struct work_struct *work)
{
struct snd_dg00x *dg00x =
container_of(work, struct snd_dg00x, dwork.work);
int err;
if (dg00x->registered)
return;
err = snd_card_new(&dg00x->unit->device, -1, NULL, THIS_MODULE, 0,
&dg00x->card);
if (err < 0)
return;
err = name_card(dg00x);
if (err < 0)
goto error;
err = snd_dg00x_stream_init_duplex(dg00x);
if (err < 0)
goto error;
snd_dg00x_proc_init(dg00x);
err = snd_dg00x_create_pcm_devices(dg00x);
if (err < 0)
goto error;
err = snd_dg00x_create_midi_devices(dg00x);
if (err < 0)
goto error;
err = snd_dg00x_create_hwdep_device(dg00x);
if (err < 0)
goto error;
err = snd_dg00x_transaction_register(dg00x);
if (err < 0)
goto error;
err = snd_card_register(dg00x->card);
if (err < 0)
goto error;
dg00x->card->private_free = dg00x_card_free;
dg00x->card->private_data = dg00x;
dg00x->registered = true;
return;
error:
snd_dg00x_transaction_unregister(dg00x);
snd_dg00x_stream_destroy_duplex(dg00x);
snd_card_free(dg00x->card);
dev_info(&dg00x->unit->device,
"Sound card registration failed: %d\n", err);
}
static int snd_dg00x_probe(struct fw_unit *unit,
const struct ieee1394_device_id *entry)
{
struct snd_dg00x *dg00x;
/* Allocate this independent of sound card instance. */
dg00x = kzalloc(sizeof(struct snd_dg00x), GFP_KERNEL);
if (dg00x == NULL)
return -ENOMEM;
dg00x->unit = fw_unit_get(unit);
dev_set_drvdata(&unit->device, dg00x);
mutex_init(&dg00x->mutex);
spin_lock_init(&dg00x->lock);
init_waitqueue_head(&dg00x->hwdep_wait);
/* Allocate and register this sound card later. */
INIT_DEFERRABLE_WORK(&dg00x->dwork, do_registration);
snd_fw_schedule_registration(unit, &dg00x->dwork);
return 0;
}
static void snd_dg00x_update(struct fw_unit *unit)
{
struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device);
/* Postpone a workqueue for deferred registration. */
if (!dg00x->registered)
snd_fw_schedule_registration(unit, &dg00x->dwork);
snd_dg00x_transaction_reregister(dg00x);
/*
* After registration, userspace can start packet streaming, then this
* code block works fine.
*/
if (dg00x->registered) {
mutex_lock(&dg00x->mutex);
snd_dg00x_stream_update_duplex(dg00x);
mutex_unlock(&dg00x->mutex);
}
}
static void snd_dg00x_remove(struct fw_unit *unit)
{
struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device);
/*
* Confirm to stop the work for registration before the sound card is
* going to be released. The work is not scheduled again because bus
* reset handler is not called anymore.
*/
cancel_delayed_work_sync(&dg00x->dwork);
if (dg00x->registered) {
/* No need to wait for releasing card object in this context. */
snd_card_free_when_closed(dg00x->card);
} else {
/* Don't forget this case. */
dg00x_free(dg00x);
}
}
static const struct ieee1394_device_id snd_dg00x_id_table[] = {
/* Both of 002/003 use the same ID. */
{
.match_flags = IEEE1394_MATCH_VENDOR_ID |
IEEE1394_MATCH_MODEL_ID,
.vendor_id = VENDOR_DIGIDESIGN,
.model_id = MODEL_DIGI00X,
},
{}
};
MODULE_DEVICE_TABLE(ieee1394, snd_dg00x_id_table);
static struct fw_driver dg00x_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "snd-firewire-digi00x",
.bus = &fw_bus_type,
},
.probe = snd_dg00x_probe,
.update = snd_dg00x_update,
.remove = snd_dg00x_remove,
.id_table = snd_dg00x_id_table,
};
static int __init snd_dg00x_init(void)
{
return driver_register(&dg00x_driver.driver);
}
static void __exit snd_dg00x_exit(void)
{
driver_unregister(&dg00x_driver.driver);
}
module_init(snd_dg00x_init);
module_exit(snd_dg00x_exit);
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